"I have to maintain a fine balance between not hurting The Avengers... and [also] not be the guy who shows up once a month and undoes everything that's been done by everyone else," he explained.

Whedon's brother Jed will work alongside Melissa Tancharoen and Jeffrey Bell on the day-to-day production of S.H.I.E.LD. with Whedon himself serving as executive producer and also direct the show's pilot episode.

"One of the great things about having worked for so damn long is that there are so many people that I truly trust," he said.